21260260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{839}}^1$

素因数の和:1036

約数の個数: 48

約数和(自身を含む): 51367680

約数和(自身を除く): 30107420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 181, 362, 724, 839, 905, 1267, 1678, 1810, 2534, 3356, 3620, 4195, 5068, 5873, 6335, 8390, 11746, 12670, 16780, 23492, 25340, 29365, 58730, 117460, 151859, 303718, 607436, 759295, 1063013, 1518590, 2126026, 3037180, 4252052, 5315065, 10630130, 21260260]

約数ペア:

[(1, 21260260), (2, 10630130), (4, 5315065), (5, 4252052), (7, 3037180), (10, 2126026), (14, 1518590), (20, 1063013), (28, 759295), (35, 607436), (70, 303718), (140, 151859), (181, 117460), (362, 58730), (724, 29365), (839, 25340), (905, 23492), (1267, 16780), (1678, 12670), (1810, 11746), (2534, 8390), (3356, 6335), (3620, 5873), (4195, 5068)]